07. Area of Figures

from math import pi

figure = input()
area = 0

if figure == 'square':
    side = float(input())
    area = side * side

elif figure == 'triangle':
    lenght = float(input())
    hight = float(input())
    area = lenght * hight / 2

elif figure == 'circle':
    radius = float(input())
    area = radius * radius * pi

elif figure == 'rectangle':
    first_side = float(input())
    second_side = float(input())
    area = first_side * second_side

print(f'{area:.3f}')


ДРУГО РЕШЕНИЕ:

from math import pi

figure = input()

if figure == 'square':
    print(f'{float(input()) ** 2:.3f}')
elif figure == 'triangle':
    print(f'{float(input()) * float(input()) / 2:.3f}')
elif figure == 'circle':
    print(f'{float(input()) ** 2 * pi:.3f}')
elif figure == 'rectangle':
    print(f'{float(input()) * float(input()):.3f}')


РЕШЕНИЕ С ТЕРНАРЕН ОПЕРАТОР:

from math import pi

figure = input()

area = float(input()) ** 2 if figure == 'square' \
    else float(input()) ** 2 * pi if figure == 'circle' \
    else float(input()) * float(input()) / 2 if figure == 'triangle' \
    else float(input()) * float(input()) if figure == 'rectangle' else 0

print(f'{area:.3f}')

РЕШЕНИЕ С IF-ELSE И ТЕРНАРЕН ОПЕРАТОР:

from math import pi

figure = input()

if figure in ('square', 'circle'):
    print(f'{float(input()) ** 2 * (pi if figure == "circle" else 1):.3f}')
elif figure in ('triangle', 'rectangle'):
    print(f'{float(input()) * float(input()) / (2 if figure == "triangle" else 1):.3f}')


РЕШЕНИЕ С РЕЧНИК:

from math import pi

figure = input()
a = float(input())
b = 0
if figure in ('triangle', "rectangle"):
    b = float(input())

area = {'square': a ** 2,
        'triangle': a * b / 2,
        'circle': a ** 2 * pi,
        'rectangle': a * b
        }

print(f'{area[figure]:.3f}' if figure in area else '')


РЕШЕНИЕ С ФУНКЦИИ:

from math import pi


def figures(figure):
    if figure == 'square':
        return square()
    elif figure == 'triangle':
        return triangle()
    elif figure == 'circle':
        return circle()
    elif figure == 'rectangle':
        return rectangle()


def square():
    return float(input()) ** 2


def triangle():
    return float(input()) * float(input()) / 2


def circle():
    return float(input()) ** 2 * pi


def rectangle():
    return float(input()) * float(input())


print(f'{figures(input()):.3f}')